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MDC-2900 Series
Chapter 3 Setup after installation
0092629012-07
3-17
3.3.13 Change of background noise and target signal gradation
With this function, it is possible to make edges of target images sharper and also to change the
colors of sea clutter and rain to different colors with more neutral tone.
With colors with more neutral tone, it could become easy to distinguish sea clutter and rain from
targets with difference of colors, but sensitivity may seem to have decreased due to weaker
images of weak signals. However, these images are suitable for heavy weather.
3.3.13.1 Change of background noise
Background noise level and display gradation against target echo intensity level can be changed
when VIDEO MODE is 0, 1, 2 or 3.
1. Move the cursor on to VIDEO MODE and set for the number to change. Refer to Operation
manual 4.5 VIDEO MODE to detail.
2. Set [GAIN] knob at scale 9, [RAIN] knob at DIFF and 0, [SEA] knob at MANUAL and 0, [BRILL]
at maximum, IR at 3 and the range at 6 NM.
3. Press [MENU] key, and select [MAINTENANCE] => [PRESET] => [VIDEO SETUP] => [LOW
LEVEL] => to highlight the last digit value, roll the trackball up or down to change the value, and
then press [ENT] key.
3.3.13.2 Change of Signal gradation
When signals of a particular transmission pulse length are displayed weaker, enhancement of
echoes can be arranged by making, HIGH LEVEL value smaller. On the contrary, when clutter and
target echoes are displayed by same intensity and there exist no gradation difference, clutter
echoes can be presented weaker by increasing HIGH LEVEL value.
1. Display desired pulse length.
2. Press [MENU] key, and select [MAINTENANCE] => [PRESET] =>
[VIDEO SETUP] => [HIGH LEVEL], if a trackball is rolled to
the right, the following sub-menus will be displayed.
3. Confirm Pulse length in the top left area of the screen, and
highlight the desired pulse length value to change the value by
rolling the trackball up and down to desired value while watching
echoes. Then press [ENT] key to fix.
S P 8 0
M P 1 8 0
M P 2 8 0
M P 3 9 4
M P 4 9 4
L P 1 9 4
L P 2 9 4
Figure 3.6 HIGH LEVEL Menu